Release v1.5.12

Changes since v1.5.11
----------------------
6c830d4 Run cljfmt on generated source :)
d9ad1a5 Add tests for empty/nonempty decoding
db4167a Add test resources: empty.proto
66c4d26 Add Sean Harrap to contributors
9da5168 Remove elision for empty messages
fd3c39d Update CONTRIBUTORS.md
4ff5a31 Fix response-channel leak
5655842 Add ef-test to REPL
93bc8da Update README.md
05f6092 Update documentation (#75)

Signed-off-by: Greg Haskins <greg@manetu.com>

project.clj

@@ -1,4 +1,4 @@
-(defproject protojure "1.5.12-SNAPSHOT"
+(defproject protojure "1.5.12"
   :description "Support library for protoc-gen-clojure, providing native Clojure support for Google Protocol Buffers and GRPC applications"
   :url "http://github.com/protojure/library"
   :license {:name "Apache License 2.0"